One problem related to crankcase (pcv) has been reported for the 2012 Audi Q7. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Audi Q7 based on all problems reported for the 2012 Q7.
Low oil light came on 3,000 miles after oil change. Noticed oil on ground under vehicle where it is parked in garage. Took it back to Audi service center and they went over it and said that it needs the pcv (pressure control valve) replaced as they have seen this in the past on similar engines and it fixes the problem. They stated that there is a valve that is not closing all the way and oil is passing through and is being consumed. They said that the new pcv has a different part number than the original pcv and is made better. If not fixed, it could lead to more expensive motor repairs. I'm having the pcv replaced tomorrow at the Audi service center for a cost of $1,700 and I hope this fixes the oil consumption. My Audi has 100,000 miles on it and I have had no other problems with it. Since they said the original part has been replaced with a "new and improved" part, shouldn't Audi recall the original pcv and offer a replacement pcv since it seems to be defective? they said they have seen this occur on similar engines which leads me to believe there are many out there that require replacement. The pcv could stay open and you lose all engine oil and then what happens when you're driving on the highway going 80 mph?.